package cn.edu.hbwe.book.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

/**
 * Servlet Filter implementation class CharacterEncodingFilter
 */
public class CharacterEncodingFilter implements Filter {

    String encoding = "utf-8";
	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		encoding = fConfig.getInitParameter("encoding");
	}
	
	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		// TODO Auto-generated method stub
		// place your code here
		request.setCharacterEncoding(encoding);//-->POST
		
		HttpServletRequest  req = (HttpServletRequest)request;
		
		System.out.println(req.getRequestURI());
		response.setCharacterEncoding(encoding);
		
		System.out.println("CharacterEncodingFilter doFilter()...");
		// pass the request along the filter chain
		chain.doFilter(request, response);
	}

	

	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

}